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Can a sound wave kill you?
science.howstuffworks.com/can-sound-wave-kill.htm
A sound wave alone probably won't kill you. Crank the volume on a terrible song, though, and you just might annoy everyone to death.
When will life on Earth end?
science.howstuffworks.com/life/evolution/life-on-earth-end.htm
Imagine a time in Earth's far-flung past when organisms didn't swim through the oceans or populate the lands. Even the mighty dinosaurs hadn't arisen. Will the planet ever return to that lifeless state?
What Is Citric Acid, and Is It Safe?
recipes.howstuffworks.com/food-science/citric-acid.htm
HowStuffWorks finds out what citric acid is, how it is made and whether or not it is safe.
Natural Skin Care: 5 Important Herbs in Face Wash
If you love natural skin care products, these herbs â€" lavender, calendula, witch hazel, neem oil and feverfew â€" can help you get glowing skin.
Your Grocery Store Apple Could Be a Year Old, But That's OK
recipes.howstuffworks.com/grocery-store-apple-one-year-old.htm
Science has made it possible for some apples to be stored as long as a year before selling. How is that done, and is it safe?
Cinnabar: Red, Beautiful — and Toxic
science.howstuffworks.com/environmental/earth/geology/cinnabar.htm
Cinnabar's bright-red pigment has been used in jewelry, pottery and makeup for millennia. But cinnabar is also the primary ore for mercury, making it a dangerous mineral if the particles are inhaled.
Empty Pill Bottles Piling Up? Here Are 15 Great Ways to Reuse Them
home.howstuffworks.com/green-living/uses-old-pill-bottles.htm
Wondering what to do with those plastic pill bottles your prescriptions come in? Here are 15 great ways to reuse them and keep them out of the landfill.
The Origins of the Steamship
science.howstuffworks.com/innovation/inventions/steamship.htm
Steamships quickly replaced sails in the early 1800s. Learn more about the origins of steamships and the innovations that led to their creation.
9 Best Countries for Expats to Retire To
money.howstuffworks.com/personal-finance/retirement-planning/best-countries-for-expats-to-retire.htm
When researching the best countries for expats to retire to, you may discover that moving abroad can stretch retirement income much further. Lower living costs, affordable health care, and welcoming expat communities often make retiring abroad financially realistic even with modest retirement savings.
How the Fed Works
money.howstuffworks.com/fed.htm
Think the U.S. economy works only by supply and demand? Not so. If you own a house, have a bank account or write checks, the Federal Reserve System affects your everyday life. Find out all about the Fed.